Concord, NH 03281 Frost Dates
Frost dates for Concord, NH, ZIP 03281
The last spring frost here typically falls around 05/02, about 247 days from today. The first fall frost typically arrives around 10/08, about 158 frost-free days later.
Zone 6a (-10 to -5°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Concord, not a forecast for this year.
What to do before the first frost
Zone 6a around Concord has about 6 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
The actual range around Concord's last frost
05/02 is the middle of 30 years of NOAA records, not a promise. Plant by 04/22 and you're betting against frost in roughly 9 years out of 10. 05/14 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Concord compares
About 158 days separate Concord's last and first frost, putting it 32,891 of 40,283 ZIP codes nationally. Within NH, it ranks 73 of 260.
Learn more
the frost range explains how to read the range around Concord's dates instead of trusting one, and local microclimates explains what one yard in Concord can differ from the 03281 normal.